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SQL Delete query where = sub-query

Posted on 2009-06-29
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Last Modified: 2013-12-07
Hello,
I'm trying to delete all the rows from table A where the Acc num matches the same account number from table B.

Tried the 23 queries below but they don't want to run

Any one know how to correct them?

First Attempt
 
DELETE A.*
FROM A, B
WHERE A.ACC_NUM=B.ACC_NUM=
 
Second Attempt
 
DELETE A.*
FROM A
WHERE A.ACC_NUM=(SELECT ACC_NUM
                                    FROM B);

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Question by:ShockUK
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2 Comments
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 24734488
use IN instead of =
DELETE A.*
FROM A
WHERE A.ACC_NUM IN (SELECT ACC_NUM
                                    FROM B);

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LVL 5

Expert Comment

by:mnialon
ID: 24734495
DELETE
FROM A
WHERE A.ACC_NUM IN (SELECT ACC_NUM
                                    FROM B);
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